Update .editorconfig and .gitattributes

Author: scheb

.editorconfig

@@ -10,8 +10,4 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.xml]
-end_of_line = LF
 indent_style = tab
-indent_size = 4
-trim_trailing_whitespace = true
-insert_final_newline = true

.gitattributes

@@ -3,6 +3,7 @@
 /.github export-ignore
 /Resources/doc export-ignore
 /Tests export-ignore
+/.editorconfig export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
 /.php_cs.dist export-ignore
@@ -11,5 +12,7 @@
 /CONTRIBUTING.md export-ignore
 /php_cs.xml export-ignore
 /phpunit.xml.dist export-ignore
+/psalm.xml export-ignore
 /README.md export-ignore
+/SECURITY.md export-ignore
 /UPGRADE.md export-ignore